词汇	period of decline
释义	period of decline 衰老期
随便看	formal design formal designator formal design description Formal Design Review formal design specification formal detection formaldethde formal development Formal Development Methodology formal device handler formal dicipline formal difference Formal dining room with chandelier formal dinner formal dinner table formal diplomatic link formal diplomatic relation formal discipline formal discretization error formal discussion Formal dismissal of an assembly or legislature formal disoretization error formal distinctions by rhythm Formal Distribution formal division